People protect your health because of surroundings are polloution every where. Sweezing is disease and cover mousk your face and protect your health. If u sweezing any one it's spread to 150k/m virous that is main reason .If u had got sweezing and The virous enter inter other person .The virous spread to every where. That is main cause. So All people Alter every movement and protect your Life.( Editor Akki- viswanadh.).